<template>
	<view>
		<!-- 自定义组件 -->
		<!-- <my-search :bgcolor="'pink'" :radius="3"></my-search> -->
		<my-search @click="gotoSearch"></my-search>
		<view class="scroll-view-container">
			<!-- 左侧的滑动区 -->
			<scroll-view class="left-scroll-view" scroll-y="true"  :style="{height:wh+'px'}">
				<block v-for="(item,i) in cateList" :key="i">
						<view :class="['left-scroll-view-item',i===active?'active':'']" 
						@click="activeChanged(i)"
						>{{item.cat_name}}</view>
				</block>
			</scroll-view>
			<!-- 右侧的滑动区 -->
			<scroll-view scroll-y="true"  :style="{height:wh+'px'}" :scroll-top="scrollTop">
				<view class="cate-lv2" v-for="(item2,i2) in cateLevel2" :key="i2">
					<!-- 二级分裂的标题 -->
					<view class="cate-lv2-title">{{item2.cat_name}}</view>	
					<!-- 当前二级分类下的三级分类列表 -->
					<view class="cate-lv3-list">
						<!-- 三级分类的item项 -->
						<view class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
							
							<image :src="item3.cat_icon.replace('dev','web')"></image>
							
							<text>{{item3.cat_name}}</text>
							
						</view>
					</view>
				</view>
			</scroll-view>
			
		</view>
	</view>
	
</template>

<script>
	import badgeMix from '@/mixinx/tabbar-badge.js'
	export default {
		mixins:[badgeMix],
		data() {
			return {
				//当前设备可用高
				wh:0,
				cateList:[],
				active:0,
				//二级分类的列表
				cateLevel2:[],
				scrollTop:0
			};
		},
		onLoad(){
			const sysInfo=uni.getSystemInfoSync()
			this.wh=sysInfo.windowHeight-50
			
			this.getCateList()
		},
		methods:{
			//获取分裂列表的数据
			async getCateList(){
				const {data:res}=await uni.$http.get('/api/public/v1/categories')
				if(res.meta.status!==200)return uni.$showMsg()
				this.cateList=res.message
				
				//为二级分类赋值
				this.cateLevel2=res.message[0].children
			},
			activeChanged(i){
				this.active=i
				//重新为二级分类数组赋值
				this.cateLevel2=this.cateList[i].children
				//滚动条移动至最上方
				this.scrollTop=this.scrollTop===0?1:0
			},
			gotoGoodsList(item){
				
				uni.navigateTo({
					url:'/subpkg/goods_list/goods_list?cid='+item.cat_id
				})
			},
			gotoSearch(){
				uni.navigateTo({
					url:'/subpkg/search/search'
				})
			}
		}
	}
</script>

<style lang="scss">
	.scroll-view-container{
		display: flex;
		
	.left-scroll-view{
		width: 120px;
	}
	}
	.left-scroll-view-item{
		background-color: #f7f7f7;
		line-height: 60px;
		text-align: center; 
		font-size: 12px;
		position: relative;
		
		&.active{
			background-color: #FFFFFF;
			
			
			&::before{
				content: '';
				display: block;
				width: 3px;
				height: 30px;
				background-color: #C00000;
				position: absolute;
				top: 50%;
				left: 0;
				transform: translateY(-50%);
			}
		}	
	}
	.cate-lv2-title{
		font-size: 12px;
		font-weight: bold;
		text-align: center;
		padding: 15px 0;
	}
	.cate-lv3-list{
		display: flex;
		//保存不下的化自动换行
		flex-wrap: wrap;
		.cate-lv3-item{
			width: 33.33%;
			display: flex;
			flex-direction: column;
			justify-content: center;
			align-items: center;
			margin-bottom: 10px;
			image{
				width: 60px;
				height: 60px;
			}
			text{
				font-size: 12px;
			}
		}
	}
	
	
</style>
